JPS6135464B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel drying method and apparatus thereof, which has an extremely fast drying rate and a good drying finish.

The present inventor previously published Japanese Patent Application No. 55-132065.
Publication No. 57-55378 and Japanese Patent Application No. 1983-94630
-Developed a reduced pressure equilibrium heating method and device such as those disclosed in Publication No. 19582.

This invention is based on the technical contents of the invention described above, and a forced circulation mechanism is added thereto to give forced circulation and rectification to the reduced pressure heated air flow inside the hollow chamber.
To provide a drying method and device that can significantly improve the drying effect.

〓〓〓〓
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the reduced pressure equilibrium heating method and apparatus according to the present invention will be explained below based on the apparatus shown in the drawings.

Reference numeral 1 denotes a horizontally rectangular cylindrical sealed hollow chamber with a door 2 pivotally attached to it so that it can be opened on one side, and the upper, lower, left and right outer peripheral walls 3 are coated with heat insulating material to keep the room warm. Reference numeral 4 denotes an exhaust port opened in the center of the side wall of the hollow chamber 1, which communicates with one side of the hollow chamber 1 through an exhaust pipe 5, and a support cylinder 7 of the rotating body a which has a suction port 6 opened at its innermost end. Connected. Therefore, the support cylinder 7 rotatably supports the rotating body a. and,
In the illustration, the rotating body a is constituted by rotary blades such as a propeller fan or a Shirotsuko fan rotated by an electric motor 8, has a desired inclination angle, and sucks and exhausts the air in the hollow chamber 1. The direction of rotation is determined as follows.

A depressurizing friction generating mechanism X is formed in the mounting portion of the rotating body a, and a frictional heat generating unit A is formed in the rotating region of the rotating body a, and the mechanism First, a series of special requests were made.
No. 55-132065 (Japanese Unexamined Patent Publication No. 57-55378), patent application
No. 56-24216 (Japanese Unexamined Patent Publication No. 57-139253), patent application
56-142440 (Japanese Unexamined Patent Publication No. 58-45483) and the like can be provided.

Reference numerals 9 and 9 denote forced circulation rotation mechanisms disposed above and below the rotating body a, including support cylinders 10, 10 of approximately the same size as the support cylinder 7 of the rotating body a, and support cylinders 10, 10. rotating body b supported by
b, and the rotating bodies b, b are rotatably faced to the suction ports 11, 11 of the respective support cylinders 10, 10, and the respective support cylinders 10, 10 are provided with
U-shaped ducts 12, 12 that can change the wind direction by 180 degrees are connected, and the ducts 12, 12 are connected to each other.
The airflow discharge ports 13, 13 are enlarged in a truss shape along the front wall side or the rear wall side of the hollow chamber 1, respectively. Guide portions 14, 14 are connected to the front portions of the airflow outlets 13, 13, and the hollow chambers 14, 14 are connected to the openings 14a, 14a of the guide portions 14, 14, with or without an appropriate damper or throttle. It opens toward the wall on the other side. Although the rotating bodies b and b used here have a large functional difference from the rotating body a that exhibits a frictional heat generating effect, there is no difference in the basic configuration and they are rotated by electric motors 15 and 15. It is composed of rotating blades such as a propeller fan or a sirotskov fan, has a desired inclination angle, and has a hollow chamber 1.
The air inside is sucked through the suction ports 11, 11, and the support tube 1 is
Any structure may be used as long as it can perform forced circulation such as discharging from the guide portions 14, 14 into the hollow chamber 1 through the ducts 12, 12.

16 is an outside air introduction mechanism necessary only for feeding outside air into the hollow chamber 1, and one end of the outside air introduction pipe 18 having the valve mechanism 17 is made to face outside the hollow chamber 1;
The other end is opened into the hollow chamber 1. In addition,
Although not shown in the drawings, a replaceable or purifiable filter may be installed as needed to remove dirt from the outside air.

By the way, in this embodiment, if the suction air is heated and introduced inside the hollow chamber 1 of the outside air introduction pipe 18, the temperature drop of the air inside the hollow chamber 1 can be reduced.
Or, since it can be eliminated, the outside air introduction pipe 18
A heating tube 1 whose inner end is inserted into the outer periphery of an exhaust tube 5
9 to exchange heat with the introduced outside air through the already heated exhaust pipe 5 or the annular heating passage formed between the exhaust pipe 5 and the heating pipe 19, and then to the heating pipe 19. Many louvers perforated 2
0 into the hollow chamber 1.

Further, the valve mechanism 17 can be opened and closed by manual operation that can be operated at any time, or can be operated as an automatic operation such as a timer or under a desired operating pressure condition, or can be operated under various other control conditions. It can be used as an automatic control valve that can be opened and closed automatically.

Reference numeral 21 denotes an auxiliary heating section provided in the duct 12 as needed, and an appropriate heating means such as an electric heater or a fuel heater can be used. 22 is a cooling pipe for preventing overheating of the electric motors 8, 15, and 15 of each of the rotating bodies a, b, and b, and has one end facing outside the hollow chamber 1, and is designed to be cooled by an air cooling effect by introducing outside air. .

Reference numeral 23 denotes curved guide surfaces for forced airflow provided along the side surfaces within the hollow chamber 1, and the required number of guide surfaces are provided at necessary locations such as corner portions and airflow collision portions. Reference numeral 24 denotes one or more supports provided on one side of the hollow chamber 1, which firmly support the support cylinders 7, 10, and 10 equipped with the rotating bodies a, b, and b at appropriate positions.
The exhaust pipe 5, ducts 12, 12, etc. can be held securely. The hollow chamber 1 is divided so that the processing volume of the material to be dried can be maintained as a relatively large storage chamber 25. 26 is a net stretched over the opening surface of each suction port 6, 11, 11; 27 is a shelf for drying at each stage on which objects to be dried can be placed; 28 is a temperature facing the surface of the hollow chamber 1; A display control panel for various control devices such as pressure and electric switches, 29 a viewing window, and 30 a handle.

The operation of this invention will be explained based on the above configuration.

First, the door 2 is opened, the desired material to be dried is stored in the shelf 27 of the storage chamber 25 of the hollow chamber 1, and the display and control panel 2 is opened.
At step 8, set the required temperature, pressure, time, and other necessary items and turn on the switch.

Then, the electric motors 8, 15, 15 start driving. By the way, in the electric motor 8, since the rotating body a constituting the rotating blade starts to rotate, the reduced pressure frictional heating generation mechanism X works, and the air in the sealed hollow chamber 1 is
It passes through the exhaust pipe 5, is exhausted through the exhaust port 4, and is gradually depressurized by the suction and exhaust action of the rotating body a.
The pressure difference between the inside and outside of the hollow chamber 1 gradually increases,
When a certain pressure difference is reached, an approximately equilibrium state is maintained. The pressure difference between the inside and outside of the hollow chamber 1 in this approximately constant equilibrium state is determined by the magnitude of the rotational suction force of the rotating body a, but this equilibrium state will remain as long as the rotational action of the rotating body a continues. maintained.

In this equilibrium state, a phenomenon of air stagnation occurs in the friction generating part A within the rotation area of the rotating body a,
Since the frictional action with the rotary body a continues to be repeated, frictional heat is generated and the temperature gradually rises, and this frictional heat is successively propagated into the hollow chamber 1 to heat the interior to a desired temperature.

On the other hand, the rotating bodies b, b rotated by the electric motors 15, 15 divide the air in the storage chamber 25 into upper and lower parts on one side of the hollow chamber 1, and suck the air into the duct from the support tubes 10, 10. 12, 12 to the guide portions 14, 14, and the openings 14a, 14.
Since it is forcibly sent out to the other side of the hollow chamber 1 along the side walls in front and rear of a, the reduced pressure and heated air flow is smoothly circulated within the hollow chamber 1 by the guide curved surface part 23 and reaches the center of the hollow chamber 1. Converge in parts. This air flow is obtained continuously and forcibly by the rotation of the rotors b, b, and the reduced pressure heated flow becomes rectified in the hollow chamber 1 and exhibits a circulating flow state in a certain direction. The temperature distribution becomes uniform, and the reduced-pressure heating drying effect is effectively performed on all the items to be dried on all the shelves provided in multiple stages. In addition to this temperature uniformity, since the air flow in the hollow chamber 1 is a depressurized and heated flow directed in a certain direction, the wind action in a certain direction on the material to be dried acts synergistically with the heating and depressurizing action. The drying effect is significantly improved.

By activating the outside air introduction mechanism 16 and opening the valve mechanism 17 automatically or manually, the vaporized moisture within the hollow chamber 1 can be effectively discharged to the outside through the exhaust port 4, thereby further improving the drying effect.

Although one embodiment of the present invention has been described above, the present invention can be implemented in the same manner with the following configuration not shown, and is included in the present invention.

(a) The decompression friction generating mechanism X by the rotary body a can be installed not only in one place but also in the required number of places depending on the size of the hollow chamber 1.

(b) One or more required number of forced circulation rotation mechanisms 9 including the rotating body b can be installed in the hollow chamber 1 to freely set the circulation effect of the reduced pressure heated air flow.

(c) The rotational speed of the rotating bodies a and b can be freely increased or decreased, and the temperature, degree of pressure reduction, and flow rate of the reduced-pressure heated air stream can be varied.

(d) The structure of the hollow chamber 1 can be of any shape and size, such as a rectangular cylinder, a cylindrical shape, or an oblong cylinder.

(E) The setting locations of rotating bodies a and rotating bodies are hollow chamber 1.
It can be installed anywhere in the air, but the key is to direct the reduced pressure heated air flow to the left and right (horizontal) to dry the items to be dried.
It is sufficient if it can be generated constantly in a desired direction, such as in the direction or in the vertical (vertical) direction.

(F) Inside the hollow chamber 1, if necessary, a Sirotskov fan or the like may be attached to a corner or the like to assist in rectifying the forced circulation reduced pressure heated air.

(G) The ducts 12, 12 may be provided with a damper (control body) for controlling the flow velocity.

As described above, this invention suctions and exhausts the air inside the hollow chamber by the rotating action of the rotary body in the friction heat generating part, maintains the inside of the hollow chamber in a constant reduced pressure state, and maintains a constant pressure difference between the inside and outside. In the equilibrium state of
Frictional heat is generated by the frictional action between the rotating body and the air, and the decompressed heated air in the hollow chamber is rectified in one direction by the function of a forced circulation rotation mechanism that rotates at the same time. Since the temperature within the hollow chamber can be maintained uniformly, the air flow effectively acts on the material to be dried within the hollow chamber, and the drying process is carried out in an extremely short time.

In particular, if the outside air introduction mechanism is activated, the vaporized moisture in the hollow chamber can be exhausted instantly, resulting in more effective drying processing.

In addition, a metal plate such as aluminum or tin plate is used as a lid plate or a bottom plate for a plate (a net plate commonly called Ebira) on which the material to be dried is placed, and the material to be dried is held between the plates. When using a device as shown in the figure, which is installed horizontally in multiple stages to obtain a horizontal air flow using a forced circulation rotation mechanism, this metal plate acts as a kind of heat storage material and quickly removes the material to be dried from above or below. Since it can be heated, the drying effect from the front and back of the object to be dried is further improved, and the drying time is one-fifth that of conventional methods.
We were able to reduce the drying time by an astonishing one-fourth.

In this invention, any material can be used as the material to be dried, but it is preferable to use a material with a relatively large specific gravity since the circulating reduced pressure heated air flow is applied thereto.

Furthermore, since the material to be dried is dried by heat treatment under reduced pressure, the product maintains its original color without fading or discoloring due to drying, and has the effect that quality does not deteriorate.

Further, according to the present invention, only an electric motor is used as the heat source and motive power, and no heater is required, so power consumption can be saved, and therefore, the so-called energy saving effect can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the drying method according to the present invention, FIG. 2 is a longitudinal cross-sectional view of the same, and FIG. 3 is a cross-sectional view of the same. 1... Hollow chamber, 6, 11, 11... Suction port,
8, 15, 15... Electric motor, 9, 9... Forced circulation rotation mechanism, 12, 12... Duct, 16... Outside air introduction mechanism, 17... Valve mechanism, a, b, b...
Rotating body, A...frictional heat generating section, X...decompression frictional heat generating mechanism. 〓〓〓〓

Claims (1)

[Claims] 1. The air in the sealed hollow chamber is forcibly sucked in by the rotation of a rotating body and exhausted to the outside, thereby reducing the pressure in the room and keeping the pressure difference between the inside and outside in a substantially constant equilibrium state. At the same time, while maintaining this equilibrium state, the rotating action of the rotary body is continued to promote frictional action with the air and generate frictional heat, and this frictional heat heats the inside of the hollow chamber and reduces the pressure and heat of the heated air inside the hollow chamber. is forcedly circulated by the rotating action of another rotating body that operates with its own power source different from the rotating body to create rectified reduced pressure heated air in the hollow chamber, thereby drying the material to be dried in the hollow chamber. drying method. 2 The air in the sealed hollow chamber is forcibly sucked in and exhausted to the outside by the rotating action of the rotating body, and the pressure inside the room is reduced to keep the pressure difference between the inside and outside in a substantially constant equilibrium state, and this equilibrium state is maintained. At the same time, the rotating action of the rotating body is continued to promote frictional action with the air to generate frictional heat, and this frictional heat heats the interior of the hollow chamber, and the reduced pressure heated air in the hollow chamber is heated to a temperature different from that of the rotating body. Forced circulation is made by the rotation of other rotating bodies working with a unique power source to create rectified, decompressed and heated air inside the hollow chamber, and outside air is introduced into the hollow chamber via a manually or automatically operated valve mechanism to cool the inside of the hollow chamber. A drying method characterized by drying an object to be dried. 3. A hollow chamber capable of storing a sealed object to be dried, a suction port provided at a desired location in the hollow chamber, and a rotating body disposed within the suction port to forcibly suction and discharge the air in the hollow chamber. , a frictional heat generating portion formed in the rotating region of the rotary body, and a necessary number of power sources different from the rotary body working in the hollow chamber to circulate and rectify the reduced pressure heated air in the hollow chamber. A drying device equipped with a forced circulation rotation mechanism. 4. A hollow chamber capable of storing a sealed object to be dried, a suction port provided at a desired location in the hollow chamber, and a rotating body disposed within the suction port to forcibly suction and discharge the air within the hollow chamber. , a frictional heat generating portion formed in the rotating region of the rotary body, and a necessary number of power sources different from the rotary body working in the hollow chamber to circulate and rectify the reduced pressure heated air in the hollow chamber. A forced circulation rotation mechanism is provided in the hollow chamber, and an outside air introduction mechanism is provided in the hollow chamber,
A drying device equipped with a valve mechanism that operates manually or automatically.